Multiparty session typing (MPST) is a method to automatically prove safety and liveness of protocol implementations relative to specifications. In the paper "Multiparty Session Typing in Java, Deductively" (TACAS'23), we present BGJ: a new tool to apply the MPST method in combination with Java. The checks performed using our tool are purely static (all errors are reported early at compile-time) and resource-efficient (near-zero cost abstractions at run-time), thereby addressing two issues of existing tools. BGJ is built using VerCors, but our approach is general. This artifact contains: (a) our tool and its dependencies; (b) material to replicate the example in Sect. 2; (c) material to replicate the experiments in Sect. 4.